Dell P28F004 owner manual Battery Status Lights, Beep Codes, Code Cause and Troubleshooting Steps

Icon Description

Turns on when wireless networking is enabled.

Battery Status Lights

If the computer is connected to an electrical outlet, the battery light operates as follows:

•Alternately blinking amber light and white light — An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop.

•Alternately blinking amber light with steady white light — Temporary battery failure with AC adapter present.

•Constantly blinking amber light — Fatal battery failure with AC adapter present.

•Light off — Battery in full charge mode with AC adapter present.

•White light on — Battery in charge mode with AC adapter present.

Beep Codes

The computer may emit a series of beeps during start-up if the display cannot show errors or problems. These series of beeps, called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between each set of beeps is 3 seconds, and the beep sound lasts 300 ms. After each beep and each set of beeps, the BIOS should detect if the user presses the power button. If so, BIOS will jump out from looping and execute the normal shutdown process and power system.

Code	Cause and Troubleshooting Steps
1	BIOS ROM checksum in progress or failure
	System board failure, covers BIOS corruption or ROM error
2	No RAM detected
	No memory detected
3	Chipset Error (North and South Bridge Chipset, DMA/IMR/ Timer Error) , Time-Of-Day Clock test
	failure , Gate A20 failure , Super I/O chip failure , Keyboard controller test failure
	System board failure
4	RAM Read/Write failure
	Memory failure
5	Real-time clock power fail
	CMOS battery failure
6	Video BIOS test failure
	Video card failure
7	CPU - cache test failure
	Processor failure
8	Display
	Display failure

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